AMD Ryzen 5 7645HX vs Intel Core i5-13450HX Comparison

The Verdict

The data splits these two mobile CPUs cleanly by workload type. The Intel Core i5-13450HX is the multi-threaded throughput champion for heavily parallel tasks, while the AMD Ryzen 5 7645HX is the single-thread and lightly-threaded performance leader. If your work scales across many cores, such as video rendering, complex simulations, or batch data processing, the Intel part takes the top slot with a 20.1% lead in Cinebench R23 multi-core. If you prioritize responsive single-core performance for everyday use, coding, or older games that favor high clock speeds, the AMD part is the better fit, winning Cinebench R23 single-core by 3.5% and PassMark single-thread by 9.1%. The AMD chip also excels in specific math tasks like prime number finding and extended instruction workloads. Neither part is a universal winner, so the right pick depends entirely on your dominant application type.

FAQ

Q: Which CPU is faster in multi-core rendering?

A: The Intel Core i5-13450HX. In Cinebench R23 multi-core, it scores 16797 versus 13985 for the AMD Ryzen 5 7645HX, a 20.1% advantage. In Cinebench R15 multi-core, Intel also leads with 2503 versus 2276, a 10% difference.

Q: Which CPU has the higher single-core performance?

A: The AMD Ryzen 5 7645HX. It wins Cinebench R23 single-core with 1809 versus 1746 (a 3.5% lead) and Cinebench R15 single-core with 289 versus 248 (a 14.2% lead). PassMark single-thread scores also favor AMD at 3907 versus 3553.

Q: How do the two compare in memory bandwidth?

A: The AMD Ryzen 5 7645HX has a recorded memory bandwidth of 83.2 GB/s. The Intel Core i5-13450HX does not have a memory bandwidth figure in the database, though it supports both DDR4 and DDR5 memory, while AMD supports DDR5 only.

Q: Which CPU is better for encryption tasks?

A: The AMD Ryzen 5 7645HX leads in PassMark data encryption with 17900 versus 16632 for Intel, a 7.1% advantage. AMD also wins in PassMark extended instructions (22969 versus 19083, a 16.9% lead).

Q: What are the core and thread counts?

A: The Intel Core i5-13450HX has 10 cores and 16 threads. The AMD Ryzen 5 7645HX has 6 cores and 12 threads. Despite fewer cores, AMD wins 9 of the 15 head-to-head benchmark comparisons.

Q: Which CPU has a higher boost clock?

A: The AMD Ryzen 5 7645HX has a boost clock of 5.00 GHz, while the Intel Core i5-13450HX has a boost clock of 4.60 GHz. AMD also has a higher base clock at 4.00 GHz versus 2.40 GHz for Intel.

Architecture Differences

The two processors come from fundamentally different design philosophies. The Intel Core i5-13450HX is built on Raptor Lake-HX architecture, a 10 nm Intel process with a die size of 257 mm². It uses a hybrid core layout, though the database only lists totals: 10 cores and 16 threads. The AMD Ryzen 5 7645HX uses the Zen 4 architecture, codenamed Dragon Range, fabricated on a 5 nm TSMC process. AMD's die is much smaller at 71 mm² and packs 6,570 million transistors, a figure not listed for Intel.

Cache structures differ significantly. Intel allocates 80 KB of L1 cache per core and 2 MB of L2 per core, with a shared 20 MB L3 cache. AMD uses 64 KB L1 per core, 1 MB L2 per core, and a larger shared 32 MB L3 cache. This larger L3 pool likely helps AMD in certain latency-sensitive workloads.

Memory support also diverges. Intel supports both DDR4 and DDR5 memory in dual-channel mode. AMD supports only DDR5, also dual-channel, with a rated memory bandwidth of 83.2 GB/s. Both support ECC memory. PCIe connectivity differs: Intel provides Gen 5 with 20 lanes (CPU only), while AMD provides Gen 5 with 28 lanes (CPU only). Integrated graphics are present on both, with Intel's UHD Graphics 710 versus AMD's Radeon 610M.

The manufacturing and packaging are distinct as well. Intel uses socket BGA 1964, AMD uses socket FL1. Intel's multiplier is unlocked, AMD's is not. Both were released on the same date, January 3, 2023, and both are active in production.

Specification Differences

| Specification | Intel Core i5-13450HX | AMD Ryzen 5 7645HX |

|----------------|------------------------|---------------------|

| Cores | 10 | 6 |

| Threads | 16 | 12 |

| Base Clock | 2.40 GHz | 4.00 GHz |

| Boost Clock | 4.60 GHz | 5.00 GHz |

| TDP | 55 W | 45 W |

| Socket | Intel BGA 1964 | AMD Socket FL1 |

| Process Node | 10 nm | 5 nm |

| Foundry | Intel | TSMC |

| Die Size | 257 mm² | 71 mm² |

| L1 Cache | 80 KB (per core) | 64 KB (per core) |

| L2 Cache | 2 MB (per core) | 1 MB (per core) |

| L3 Cache | 20 MB (shared) | 32 MB (shared) |

| Memory Support | DDR4, DDR5 | DDR5 |

| Memory Bandwidth | Not listed | 83.2 GB/s |

| PCIe | Gen 5, 20 Lanes | Gen 5, 28 Lanes |

| Integrated Graphics | UHD Graphics 710 | Radeon 610M |

| Multiplier Unlocked | Yes | No |

| Launch MSRP | $326 | Not listed |

The most striking differences are core count and clock speeds. Intel has 4 more cores and 4 more threads, but AMD runs at significantly higher base and boost clocks. AMD's 5 nm process gives it a much smaller die, while Intel's 10 nm process results in a larger physical package. AMD also provides more PCIe lanes and a larger L3 cache. Intel supports older DDR4 memory, which can be a cost consideration in system builds, though pricing is not analyzed here.

Head-to-Head Benchmarks

The benchmark data shows a clear split. Intel wins 6 of the 15 recorded comparisons, AMD wins 9. The most decisive win for Intel is in Cinebench R23 multi-core, where the 13450HX scores 16797 against AMD's 13985, a 20.1% margin. This is the largest delta in the entire head-to-head set. Intel also wins PassMark floating point math by a wide margin: 61776 versus 48798, a 26.6% advantage. In integer math, Intel leads 83209 versus 77432, a 7.5% gain. Cinebench R15 multi-core goes to Intel at 2503 versus 2276, a 10% edge. PassMark data compression is nearly even, with Intel ahead by just 1.2% (305990 versus 302256). PassMark physics is essentially a tie, with Intel winning by 0.5% (1504 versus 1497).

AMD's wins are concentrated in single-thread and specialized instruction tests. The biggest single win is PassMark find prime numbers, where AMD scores 178 versus Intel's 83, a massive 53.4% advantage. This indicates AMD's Zen 4 architecture handles that specific integer workload far more efficiently. AMD also leads in PassMark extended instructions by 16.9% (22969 versus 19083). In Cinebench R15 single-core, AMD wins 289 versus 248, a 14.2% gap. PassMark single-thread and singlethread (identical scores) both show AMD at 3907 versus Intel's 3553, a 9.1% lead. PassMark data encryption favors AMD at 17900 versus 16632, a 7.1% difference. PassMark random string sorting goes to AMD at 34434 versus 31940, a 7.2% edge. In PassMark multithread, AMD wins 26476 versus 25084, a 5.3% gain, despite Intel having more cores. Cinebench R23 single-core is close, with AMD ahead by only 3.5% (1809 versus 1746).

Where Each One Wins

The Intel Core i5-13450HX is the clear choice for sustained, heavily threaded workloads. The 20.1% lead in Cinebench R23 multi-core and 26.6% lead in floating point math make it the better pick for video encoding, 3D rendering, scientific simulations, and any task that saturates all available cores. Its 10-core, 16-thread configuration provides the raw parallel throughput that AMD's 6-core, 12-thread design cannot match in these tests. The near-tie in data compression and small lead in physics suggest that Intel handles general multi-threaded productivity slightly better, though the margin is thin.

The AMD Ryzen 5 7645HX dominates in single-thread and specialized workloads. The 53.4% win in prime number finding is extraordinary and points to architectural efficiency in integer-heavy loops. The 16.9% lead in extended instructions and 7.1% lead in encryption make it suitable for cryptography, compression algorithms, and other instruction-set-specific tasks. Its higher boost clock (5.00 GHz versus 4.60 GHz) and higher base clock (4.00 GHz versus 2.40 GHz) translate into a 9.1% single-thread win, which matters for everyday responsiveness, older software that uses few threads, and games that rely on one or two strong cores. The 5.3% win in PassMark multithread is notable because AMD achieves it with fewer cores, suggesting that its per-thread efficiency offsets the core deficit in that particular test.

For a practical builder, the choice hinges on the primary use case. If the laptop will spend most time in multi-core rendering or number crunching, the Intel part delivers the higher ceiling. If the workload is more varied, with a mix of single-threaded apps, encryption, and instruction-heavy tasks, the AMD part wins more individual tests and offers better per-core performance. The database does not favor one overall: both parts sit at the 84th percentile among all CPUs, and their average benchmark scores are close (34333 for Intel versus 33668 for AMD). The AMD Ryzen 5 7645HX wins more head-to-head comparisons, but the Intel Core i5-13450HX wins the largest single multi-core benchmark by a wide margin.